Floating
Best for dries, indicators, and shallow presentations where suspension matters.
Gear Setup
Fly Lines
Fly line choice is the foundation of stillwater depth control. It determines where the fly rides, how quickly it gets there, and how stable the presentation remains once the retrieve begins. Scientific Anglers lists intermediate lines around 1.25 to 1.5 inches per second, and its Sonar line family spans densities from intermediate up through more than 9 ips, which gives a useful frame for how different line classes move through the water column. citeturn351853search5turn351853search9turn351853search21
QUICK READ
Quick read
The four core line jobs
Most stillwater line decisions come down to depth, speed, and the behaviour of the food source.
Intermediate
Covers the top part of the water column just below the surface and is excellent for slow, clean movement.
Sink 3
A practical middle-depth tool for covering structure, shoals, and suspended fish.
Sink 6
A deep-water option for getting down efficiently when fish hold well below the top layers.
DEPTH CONTROL
Fly Lines
Why the line matters more than almost anything else
Fish can only eat the fly if the fly is in their lane. In lakes, that lane is often defined by temperature, oxygen, light level, structure, and the food source being targeted. The wrong line can put a good fly several feet above or below active fish. That is why serious stillwater anglers think about depth first and pattern second.
SINK RATES
Fly Lines
What sink-rate labels really mean
Published sink rates are baseline measurements, not guarantees of exact fishing depth. Current, retrieve speed, fly size, leader length, and trolling speed all affect where the fly actually tracks. Intermediate lines are ideal when trout are feeding just under the surface or when a more level presentation is needed. Sink 3 and Sink 6 lines step the system down into mid-depth and deep-water work.
TROLLING APPLICATION
Fly Lines
Why depth gets more complicated while moving
When trolling from spot to spot, the line no longer hangs vertically. It forms an angled path behind the boat. Speed, water resistance, and line density all influence the true running depth. That is exactly why sink-rate knowledge matters in stillwater trolling. Precision comes from understanding how line, speed, and time interact rather than assuming the line fishes at its full vertical sink number.
BUILDING A LINE SYSTEM
Fly Lines
What a serious stillwater angler should carry
A strong stillwater lineup usually includes a floating line, an intermediate, a mid-density sinking line such as Sink 3, and a deeper line such as Sink 6. That spread covers the surface film, upper column, mid column, and deeper structure without leaving major blind spots.
COMMON MISTAKES
Fly Lines
What line errors usually look like
The most common mistake is fishing too shallow because the angler chose the most comfortable line rather than the correct one. Another is trolling too fast with sinking lines and unintentionally lifting the entire system. A third is trying to make one line do every job instead of carrying a simple but complete range.
NEXT
Keep building the system
Continue through the gear setup
Each piece supports the next. Read them together and the logic of the stillwater system becomes much clearer.